{"id":426,"date":"2024-03-11T10:39:41","date_gmt":"2024-03-11T10:39:41","guid":{"rendered":"https:\/\/knobgear.com\/?page_id=426"},"modified":"2024-12-06T14:26:37","modified_gmt":"2024-12-06T14:26:37","slug":"advantages-vs-traditional-four-stroke-engines","status":"publish","type":"page","link":"https:\/\/knobgear.com\/cs\/birotary-engine\/advantages-vs-traditional-four-stroke-engines\/","title":{"rendered":"V\u00fdhody Birota\u010dn\u00edho motoru v porovn\u00e1n\u00ed s b\u011b\u017en\u00fdmi \u010dty\u0159dob\u00fdmi motory"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" src=\"https:\/\/knobgear.com\/wp-content\/uploads\/2024\/09\/Engine-ports.webp\" alt=\"\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Velk\u00fd pom\u011br v\u00fdkonu k hmotnosti<\/h2>\n\n\n\n<p>Vy\u0161\u0161\u00ed pom\u011br v\u00fdkonu k hmotnosti motoru je d\u00e1n jak v\u00fdznamn\u00fdm n\u00e1r\u016fstem v\u00fdkonu na jednotku objemu, tak sn\u00ed\u017een\u00edm hmotnosti, kter\u00e9ho bylo prim\u00e1rn\u011b dosa\u017eeno d\u00edky n\u00e1sleduj\u00edc\u00edm t\u0159em konstruk\u010dn\u00edm prvk\u016fm\u2026<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vysok\u00e1 objemov\u00e1 \u00fa\u010dinnost je umo\u017en\u011bn\u00e1 velk\u00fdmi pr\u016f\u0159ezy sac\u00edch kan\u00e1l\u016f<\/h3>\n\n\n\n<p>V porovn\u00e1n\u00ed s tradi\u010dn\u00edmi \u010dty\u0159taktn\u00edmi motory maj\u00ed sac\u00ed a v\u00fdfukov\u00e9 kan\u00e1ly birota\u010dn\u00edho motoru v\u00fdrazn\u011b v\u011bt\u0161\u00ed pr\u016f\u0159ez. V tradi\u010dn\u00edm \u010dty\u0159taktn\u00edm motoru se sac\u00ed a v\u00fdfukov\u00e9 ventily spolu se sv\u00ed\u010dkou a\/nebo palivov\u00fdm vst\u0159ikova\u010dem mus\u00ed vej\u00edt do prostoru v\u00e1lcov\u00e9ho otvoru. U birota\u010dn\u00edho motoru v\u00e1lce p\u0159i ot\u00e1\u010den\u00ed bloku p\u0159ech\u00e1z\u00ed p\u0159es prostor sac\u00edho kan\u00e1lu. Proto m\u016f\u017ee pr\u016f\u0159ez kan\u00e1lu pokr\u00fdvat velkou \u010d\u00e1st pr\u016fm\u011bru v\u00e1lce. Obr\u00e1zek v\u00fd\u0161e je porovn\u00e1n\u00ed s \u010dty\u0159ventilovou hlavou jasn\u011b zobrazuje tuto v\u00fdhodu. Speci\u00e1ln\u011b navr\u017een\u00e9 tvary kan\u00e1l\u016f umo\u017e\u0148uj\u00ed mnohem rychlej\u0161\u00ed otev\u00edr\u00e1n\u00ed a zav\u00edr\u00e1n\u00ed ne\u017e u tradi\u010dn\u00edch ventilov\u00fdch rozvod\u016f. To p\u0159isp\u00edv\u00e1 k celkov\u011b lep\u0161\u00edm pr\u016ftokov\u00fdm charakteristik\u00e1m a nakonec lep\u0161\u00ed objemov\u00e9 \u00fa\u010dinnosti birota\u010dn\u00edho motoru.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" src=\"https:\/\/knobgear.com\/wp-content\/uploads\/2024\/04\/Comparison-of-flow-parameters-with-the-reference-engine-e1719494016685.webp\" alt=\"Birotary engine intake exhaust flow parameters\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Vysok\u00e9 ot\u00e1\u010dky umo\u017e\u0148uje pod-\u010dtvercov\u00e1 konstrukce motoru<\/h3>\n\n\n\n<p>Konstrukce s kr\u00e1tk\u00fdm zdvihem umo\u017e\u0148uje dosa\u017een\u00ed vysok\u00fdch ot\u00e1\u010dek, p\u0159i\u010dem\u017e pr\u016fm\u011brn\u00e1 rychlost p\u00edstu z\u016fst\u00e1v\u00e1 v p\u0159ijateln\u00fdch mez\u00edch. Prototyp motoru m\u00e1 zdvih 37 mm a pr\u016fm\u011brnou rychlost p\u00edstu 12,3 m\/s p\u0159i 10 000 relativn\u00edch ot\u00e1\u010dk\u00e1ch klikov\u00e9ho h\u0159\u00eddele v\u016f\u010di bloku v\u00e1lc\u016f.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vysok\u00fd to\u010div\u00fd moment s relativn\u011b ploch\u00fdm pr\u016fb\u011bhem<\/h3>\n\n\n\n<p>Vysok\u00e1 objemov\u00e1 \u00fa\u010dinnost se prom\u00edt\u00e1 do vy\u0161\u0161\u00edho \u0161pi\u010dkov\u00e9ho to\u010div\u00e9ho momentu. K\u0159ivka to\u010div\u00e9ho momentu z\u016fst\u00e1v\u00e1 p\u0159i vysok\u00fdch ot\u00e1\u010dk\u00e1ch relativn\u011b ploch\u00e1. \u0160oup\u00e1tkov\u00fd rozvodov\u00fd mechanismus s velk\u00fdmi otvory netrp\u00ed sn\u00ed\u017een\u00edm v\u00fdkonu, kter\u00fd je  typick\u00fd pro ventilov\u00e9 rozvody p\u0159i vysok\u00fdch ot\u00e1\u010dk\u00e1ch.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-ast-global-color-0-color has-alpha-channel-opacity has-ast-global-color-0-background-color has-background is-style-wide\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">N\u00edzk\u00e9 vibrace<\/h2>\n\n\n\n<p>Birota\u010dn\u00ed motor m\u00e1 pouze jeden \u010dep klikov\u00e9ho h\u0159\u00eddele a jeho p\u00edsty se pohybuj\u00ed v jedn\u00e9 rovin\u011b a proto motor nepodl\u00e9h\u00e1 \u017e\u00e1dn\u00fdm pod\u00e9ln\u00fdm vibrac\u00edm, na rozd\u00edl od tradi\u010dn\u00edch \u0159adov\u00fdch p\u00edstov\u00fdch motor\u016f. Velmi kr\u00e1tk\u00fd zdvih vede k v\u00fdrazn\u011b ni\u017e\u0161\u00edm amplitud\u00e1m setrva\u010dn\u00fdch sil ve srovn\u00e1n\u00ed s tradi\u010dn\u00edm \u0159e\u0161en\u00edm s dlouh\u00fdm zdvihem.<\/p>\n\n\n\n<p>Odst\u0159ediv\u00e9 s\u00edly p\u016fsob\u00edc\u00ed na p\u00edsty sni\u017euj\u00ed maxim\u00e1ln\u00ed tlakovou s\u00edlu na ojnice a Koriolisovy s\u00edly \u010d\u00e1ste\u010dn\u011b vyva\u017euj\u00ed s\u00edly od setrva\u010dn\u00fdch hmot klikov\u00e9ho mechanismu.<\/p>\n\n\n\n<p>B\u011bhem jednoho absolutn\u00edho ot\u00e1\u010den\u00ed klikov\u00e9ho h\u0159\u00eddele existuje osm moment\u016f, kdy jsou s\u00edly v rovin\u011b kliky nulov\u00e9. V\u00fdsledn\u00fd vektor v\u0161ech setrva\u010dn\u00fdch sil p\u016fsob\u00edc\u00edch na motor m\u00e1 t\u00e9m\u011b\u0159 konstantn\u00ed velikost (z\u00e1vislou na p\u0159esnosti vyva\u017eovac\u00edch z\u00e1va\u017e\u00ed klikov\u00e9ho h\u0159\u00eddele) a jeho sm\u011br se ot\u00e1\u010d\u00ed kolem osy motoru s frekvenc\u00ed p\u011btkr\u00e1t vy\u0161\u0161\u00ed ne\u017e je rota\u010dn\u00ed frekvence klikov\u00e9ho h\u0159\u00eddele.<\/p>\n\n\n\n<p>Tato vysok\u00e1 frekvence ot\u00e1\u010den\u00ed v\u00fdsledn\u00e9ho vektoru s\u00edly zp\u016fsobuje vibrace s velmi mal\u00fdmi v\u00fdchylkami. Po\u010d\u00edta\u010dov\u00e1 simulace motoru v prost\u0159ed\u00ed bez vn\u011bj\u0161\u00edch vliv\u016f (motor nen\u00ed uchycen, neexistuje gravita\u010dn\u00ed pole) uk\u00e1zala maxim\u00e1ln\u00ed amplitudu 0,1 mm p\u0159i provozn\u00edch ot\u00e1\u010dk\u00e1ch.<\/p>\n\n\n\n<p>V p\u0159\u00edpad\u011b pot\u0159eby, lze motor dokonale vyv\u00e1\u017eit pomoc\u00ed jedin\u00e9ho vyva\u017eovac\u00edho h\u0159\u00eddele. Podrobnosti o simulac\u00edch kinematiky a vyv\u00e1\u017een\u00ed motoru jsou p\u0159edm\u011btem samostatn\u00e9 zpr\u00e1vy, kter\u00e1 pokr\u00fdv\u00e1 v\u00fdpo\u010detn\u00ed anal\u00fdzu. Birota\u010dn\u00ed motor je charakterizov\u00e1n velmi hladk\u00fdm chodem. Rota\u010dn\u00ed pohyb na v\u00fdstupu motoru je charakterizov\u00e1n velmi malou rota\u010dn\u00ed nerovnost\u00ed. Je to d\u00e1no vysokou frekvenc\u00ed z\u00e1\u017eeh\u016f, mal\u00fdm objemem v\u00e1lc\u016f a kombinovan\u00fdm vyu\u017eit\u00edm setrva\u010dnosti klikov\u00e9ho h\u0159\u00eddele a ot\u00e1\u010dej\u00edc\u00edho se bloku v\u00e1lc\u016f. Toto sni\u017euje vibrace v ulo\u017een\u00ed motoru.<\/p>\n\n\n\n<p>Dal\u0161\u00ed v\u00fdhodou jsou t\u0159ikr\u00e1t vy\u0161\u0161\u00ed ot\u00e1\u010dky klikov\u00e9 h\u0159\u00eddele a na opa\u010dnou stranu ne\u017e vrtule, co\u017e \u010d\u00e1ste\u010dn\u011b kompenzuje gyroskopick\u00fd moment pohonn\u00e9 jednotky.<\/p>\n\n\n\n<p>V\u00edce informac\u00ed m\u016f\u017eete nal\u00e9zt <a href=\"https:\/\/knobgear.com\/cs\/birotary-engine\/birotary-engine-antivibration-property\/\">t\u00e9to str\u00e1nce<\/a>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-ast-global-color-0-color has-alpha-channel-opacity has-ast-global-color-0-background-color has-background is-style-wide\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Kompaktn\u00ed rozm\u011bry<\/h2>\n\n\n\n<p>Mal\u00e9 rozm\u011bry ve vztahu k jeho v\u00fdkonu je jednou z hlavn\u00edch v\u00fdhod birota\u010dn\u00edho motoru. Motor je mal\u00fd jak v pr\u016fm\u011bru, tak v axi\u00e1ln\u00edm rozm\u011bru. Rozm\u011bry prototypu motoru jsou uvedeny na obr\u00e1zku n\u00ed\u017ee. V leteck\u00fdch aplikac\u00edch mal\u00fd pr\u016fm\u011br motoru vede k ni\u017e\u0161\u00edmu aerodynamick\u00e9mu odporu motorov\u00e9ho krytu. To podstatn\u011b zvy\u0161uje v\u00fdkon vrtule um\u00edst\u011bn\u00e9 p\u0159ed motorem. Kompaktn\u00ed velikost je tak\u00e9 velmi d\u016fle\u017eit\u00e1 pro pou\u017eit\u00ed jako range extender.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/knobgear.com\/wp-content\/uploads\/2024\/09\/image.webp\" alt=\"Birotary engine dimensions\"\/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-ast-global-color-0-color has-alpha-channel-opacity has-ast-global-color-0-background-color has-background is-style-wide\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Jednoduch\u00e1 konstrukce<\/h2>\n\n\n\n<p>\u0160oup\u00e1tkov\u00fd ventilov\u00fd mechanismus je mnohem jednodu\u0161\u0161\u00ed ne\u017e ventilov\u00fd mechanismus DOHC tradi\u010dn\u00edch p\u00edstov\u00fdch motor\u016f. Ventilov\u00fd mechanismus birota\u010dn\u00edho motoru obsahuje pouze p\u0159evody, kter\u00e9 poskytuj\u00ed p\u0159enos mezi klikov\u00fdm h\u0159\u00eddelem a blokem motoru. Nejsou zde \u017e\u00e1dn\u00e9 va\u010dkov\u00e9 h\u0159\u00eddele, vahadla, ventily, syst\u00e9m pro nastaven\u00ed v\u016fle ventil\u016f atd. To \u010din\u00ed motor leh\u010d\u00ed, levn\u011bj\u0161\u00ed na v\u00fdrobu a snadn\u011bj\u0161\u00ed na \u00fadr\u017ebu a opravy. Z\u00e1rove\u0148 syst\u00e9m \u0161oup\u00e1tkov\u00fdch rozvod\u016f nevylu\u010duje realizaci prom\u011bnn\u00e9ho \u010dasov\u00e1n\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vylep\u0161en\u00fd n\u00e1vrh spalovac\u00ed komory<\/h3>\n\n\n\n<p>Birota\u010dn\u00ed motor umo\u017e\u0148uje \u0159e\u0161en\u00ed spalovac\u00ed komory, kter\u00e1 nejsou snadno dostupn\u00e1 u standardn\u00edch \u010dty\u0159taktn\u00edch motor\u016f. Nap\u0159\u00edklad je zde prostor pro um\u00edst\u011bn\u00ed n\u011bkolika zapalovac\u00edch sv\u00ed\u010dek pro zajist\u011bn\u00ed dobr\u00e9ho spalov\u00e1n\u00ed sm\u011bsi. Prototyp motoru vyu\u017e\u00edv\u00e1 dvojice zapalovac\u00edch sv\u00ed\u010dek. Povrch spalovac\u00ed komory ve v\u00edku v\u00e1lce lze jednodu\u0161e a \u00fa\u010dinn\u011b chladit. Neexistuj\u00ed zde \u017e\u00e1dn\u00e1 hork\u00e1 m\u00edsta, jako jsou v\u00fdfukov\u00e9 ventily a tenk\u00e9 m\u016fstky mezi ventily, kter\u00e9 jsou t\u011b\u017eko chladiteln\u00e9. Z t\u011bchto d\u016fvod\u016f m\u016f\u017ee motor l\u00e9pe dos\u00e1hnout vy\u0161\u0161\u00edho kompresn\u00edho pom\u011bru s v\u00fdsledn\u00fdm zv\u00fd\u0161en\u00edm \u00fa\u010dinnosti. P\u0159\u00edm\u00e9 vst\u0159ikov\u00e1n\u00ed nebo dokonce syst\u00e9m prom\u011bnn\u00e9ho kompresn\u00edho pom\u011bru lze snadno um\u00edstit do spalovac\u00ed komory.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Dvourychlostn\u00ed v\u00fdstup<\/h3>\n\n\n\n<p>The birotary engine offers another advantage specific to its design. The engine can provide power output via both the crankshaft and the cylinder block. The cylinder block rotates at 1\/3 of the speed of the crankshaft. In aircraft application, the cylinder block RPMs are better suited for matching modern high efficiency propellers without the necessity of an additional reduction gearbox.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-ast-global-color-0-color has-alpha-channel-opacity has-ast-global-color-0-background-color has-background is-style-wide\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">O\u010dek\u00e1van\u00e9 v\u00fdhody v s\u00e9riov\u011b vyr\u00e1b\u011bn\u00e9m modelu<\/h2>\n\n\n\n<p>Krom\u011b v\u00fdhod, kter\u00e9 ji\u017e prototyp motoru prok\u00e1zal, se o\u010dek\u00e1v\u00e1 \u0159ada dal\u0161\u00edch v\u00fdhod, jakmile bude motor d\u00e1le vyv\u00edjen do modelu ur\u010den\u00e9ho pro s\u00e9riovou v\u00fdrobu:<\/p>\n\n\n\n<p>Birota\u010dn\u00ed motor by m\u011bl b\u00fdt levn\u011bj\u0161\u00ed na v\u00fdrobu vzhledem k jednoduchosti motoru a ni\u017e\u0161\u00ed hmotnosti.<\/p>\n\n\n\n<p>M\u011bl by b\u00fdt tak\u00e9 snaz\u0161\u00ed na \u00fadr\u017ebu s pravd\u011bpodobn\u011b del\u0161\u00edm intervalem mezi gener\u00e1ln\u00edmi opravami. U p\u00edstov\u00fdch motor\u016f je po\u017eadavek na gener\u00e1ln\u00ed opravy zp\u016fsoben zejm\u00e9na opot\u0159eben\u00edm t\u011bsn\u00edc\u00edch krou\u017eku p\u00edst\u016f. Vzhledem k velmi kr\u00e1tk\u00e9mu zdvihu, a tedy krat\u0161\u00edm vzd\u00e1lenostem, kter\u00e9 p\u00edsty uraz\u00ed, by motor m\u011bl b\u00fdt v tomto ohledu lep\u0161\u00ed. Vysok\u00e9 po\u017eadavky na gener\u00e1ln\u00ed opravy u rota\u010dn\u00edch Wankelov\u00fdch motor\u016f jsou zp\u016fsobeny \u0161patnou geometri\u00ed t\u011bsn\u011bn\u00ed na vrcholu, stejn\u011b jako vysokou rychlost\u00ed, s jakou se t\u011bsn\u00edc\u00ed prvky pohybuj\u00ed. Oba tyto probl\u00e9my \u0159e\u0161\u00ed patentovan\u00e9 \u0159e\u0161en\u00ed ut\u011bsn\u011bn\u00ed birota\u010dn\u00edho motoru.<\/p>\n\n\n\n<p>Birota\u010dn\u00ed motor m\u00e1 m\u00e9n\u011b \u010d\u00e1st\u00ed, co\u017e sni\u017euje po\u017eadavky na skladov\u00e1n\u00ed a dodavatelsk\u00fd \u0159et\u011bzec. Spojen\u00e9 s jednoduchou konstrukc\u00ed motoru by se m\u011bla v\u00fdrazn\u011b sn\u00ed\u017eit slo\u017eitost a n\u00e1klady na opravy ve srovn\u00e1n\u00ed s tradi\u010dn\u00edmi motory.<\/p>\n\n\n\n<p>Motor by tak\u00e9 mohl potenci\u00e1ln\u011b fungovat s m\u00e9n\u011b p\u0159\u00edslu\u0161enstv\u00edm. Start\u00e9r\/gener\u00e1tor by mohl b\u00fdt integrov\u00e1n p\u0159\u00edmo do bloku motoru. Pro n\u011bkter\u00e9 aplikace by mohl b\u00fdt vyvinut optimalizovan\u00fd chlad\u00edc\u00ed syst\u00e9m, kter\u00fd by pou\u017e\u00edval motorov\u00fd olej i pro chlazen\u00ed hlavy v\u00e1lce. Vzhledem k tomu, \u017ee motor u\u017e disponuje pln\u011b vybaven\u00fdm olejov\u00fdm chlad\u00edc\u00edm syst\u00e9mem pro blok v\u00e1lc\u016f, m\u016f\u017ee b\u00fdt ve t\u011bchto aplikac\u00edch dodate\u010dn\u00fd vodn\u00ed chlad\u00edc\u00ed syst\u00e9m \u00fapln\u011b eliminov\u00e1n.<\/p>","protected":false},"excerpt":{"rendered":"<p>Higher Power-To-weight Ratio Higher power-to-weight ratio of the birotary engine comes both from significant increase of the power per unit of volume and weight reduction, primarily from the following three design features: High volumetric efficiency enabled by large intake ports Compared with traditional four-stroke engines the birotary engine\u2019s intake and exhaust ports have significantly larger 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